Combined photoelectric and contact digital tachometer
FIG. 1 is a front, right side and bottom perspective view of a combined photoelectric and contact digital tachometer showing my new design; 
     FIG. 2 is a right side elevational view; 
     FIG. 3 is a left side elevational view; 
     FIG. 4 is a bottom plan view; 
     FIG. 5 is a top plan view; 
     FIG. 6 is a front elevational view; and 
     FIG. 7 is a rear elevational view thereof.